Federal Income Tax Use this calculator to estimate your income tax liability along with average and marginal tax rates. You are viewing this website at a small screen resolution which doesn't support calculators. Click here to view this calculator. Have A Question About This Topic? Name Email Address Message Thank you! Oops! Related Content Six Surprising Facts About Retirement Confidence This attention-grabbing infographic covers retirement topics you may not have considered. Choices for Your 401(k) at a Former Employer Individuals have three basic choices with the 401(k) account they accrued at a previous employer. Social Security: Maximizing Benefits There are other ways to maximize Social Security benefits, in addition to waiting to claim them.